BS EN 1264-4-2021 pdf download.Water based surface embedded heating and cooling systems Part 4: Installation.
The EN 1264 series gives guidelines for surface embedded heating and cooling systems installed in buildings, residential and non-residential (e.g. office, public, commercial and industrial buildings) and focuses on systems installed for the purpose of thermal comfort.
The EN 1264 series gives guidelines for water based heating and cooling systems embedded into the enclosure surfaces of the room to be heated or to be cooled. It also specifies the use of other heating media instead of water, as appropriate.
The EN 1264 series specifies standardized product characteristics by calculation and testing the thermal output of heating for technical specifications and certification. For the design, construction and operation of these systems, see EN 1264-3 and EN 1264-4 for the types A. B. C, D. [I. I and I. For the types E. F and G, see the EN ISO 11855 series.
The systems specified in The EN 1264 series are adjoined to the structural base of the enclosure surfaces of the building, mounted directly or with fixing supports. The EN 1264 series does not specify ceiling systems mounted in a suspended ceiling with a designed open air gap between the system and the building structure which allows the thermally induced circulation of the air. The thermal output of these systems can be determined according to the EN 14037 series and EN 14240.
EN 1264-4 specifies uniform requirements for the design and the construction of heating and cooling floor, ceiling and wall structures to ensure that the heating/cooling systems are suited to the particular application.
The requirements specified by the EN 1264 series apply only to the components of the heating/cooling systems which are part of the heating/cooling system. EN 1264-4 does not cover other elements which are not part of the heating/cooling system.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 1057:2006+A1:2010, Copper and copper alloys Seamless, round copper tubes for water and gas in sanitary and heating applications
EN 1254 (all parts), Copper and copper alloys. Plumbing fittings
EN 1264-1, Water based surface embedded heating and cooling systems – Part 1: Definitions and symbols
EN ISO 15874 (all parts), Plastics piping systems for hot and cold water installations – Polypropylene (PP)
EN ISO 15875 (all parts), Plastics piping systems for hot and cold water installations – Crosslinked polyethylene (PE.X)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 1264-1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
4 Requirements
4.1 Hydronic balancing
According to ISO 11855-6:2018, 4.8, water based heating and cooling systems shall have a hydronic balancing. The components shall be adjusted in order to ensure the required flow rates. Under dynamic conditions, e.g. during the heating up period, it shall he ensured that the hydraulic interaction between the different heating circuits is small. The flow rates in the different circuits should not be greater than the design flow rates.
Each circuit shall have a balancing device or balancing system.
The balance of the system shall be done according to the realized project, e.g. “as build”, because the length of circuits realized can differ from the project, therefore once the system has been installed, the flow rates shall be updated and then set on the manifold.
Depending on the situation of the heating and cooling system the distribution system shall be equipped with facilities for degassing and sludge separation.
4.2 Floor heating and cooling systems
4.2.1 General structural preconditions
The installation of a water floor heating and/or cooling system shall follow the prior installation of any electrical, sanitary and other pipe facilities. The structure as specified in 4.2.2.1 with the draught-free closure of all building openings, e.g. windows and outer doors, shall be completed.
4.2.2 Building layers, building components
4.2.2.1 Supporting base
The supporting base shall be prepared in accordance with relevant standards.
Any pipe work or conduits shall be fixed and encased to provide a level base upon which thermal insulation and/or acoustic insulation is added before laying the heating pipes. In this respect, the necessary structural height shall be taken into account.BS EN 1264-4 pdf free download.